Hello

For touring with an M handlebar, I'd like to replace the standard foam grips for some that have the following features:

• ergonomic
• leather or cork
• barends to allow for two or three different hand positions, and small enough to not prevent folding.

I have a couple of questions:

1. Can the Ergon GP1 BioLeder grips take barends? Alternatively, are the GP3/GP5, and GC1 compatible with an M handlebar?
2. Besides Ergon, are there other brands of grips I should know about that satisfy those requirements?

Thank you.

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Edit: One more requirement : the barends must not prevent adding a rearview mirror.